mc68hc705c4acfn Freescale Semiconductor, Inc, mc68hc705c4acfn Datasheet - Page 63

• Manufacturer Part Number: mc68hc705c4acfn
• Description: M68hc05 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

5.1 Contents
5.2 Introduction
5.3 Reset Sources
MC68HC705C4A • MC68HSC705C4A — Rev. 3.0
MOTOROLA
Technical Data — MC68HC705C4A • MC68HSC705C4A
5.2
5.3
5.3.1
5.3.2
5.3.3
This section describes how resets initialize the MCU.
A reset immediately stops the operation of the instruction being
executed, initializes certain control bits, and loads the program counter
with a user-defined reset vector address. These conditions produce a
reset:
•
•
•
Power-on reset (POR) — Initial power up
External reset — A logic 0 applied to the RESET pin
Internal computer operating properly (COP) watchdog timer reset
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Reset Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Power-On Reset (POR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
External Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Computer Operating Properly (COP)
Watchdog Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Resets
Section 5. Resets
Technical Data
63